A fully automatic powder compression device and a method for powder tabletting

Abstract

The application provides a full-automatic powder pressing device and a powder tablet pressing method, and relates to the technical field of powder forming equipment. The device comprises a base, a powder storage bin and a powder dosing dish mounted on the base, a first mechanical hand for grabbing and transporting the powder dosing dish, a pressure table mounted on the base and used for placing a powder forming mold, a second mechanical hand for placing the powder forming mold on the pressure table, a pressing rod, a pressing head arranged below the front part of the pressing rod and located directly above the pressure table, a driving mechanism for driving the pressing rod to move up and down, the driving mechanism comprising a servo motor, a multi-stage speed reduction mechanism connected with the output end of the servo motor, and a lead screw driven by the multi-stage speed reduction mechanism, the pressing rod being linked with the lead screw, a touch display screen and an intelligent control system, the intelligent control system being electrically connected with the touch display screen, the first mechanical hand, the second mechanical hand, the servo motor of the driving mechanism and a pressure sensor respectively, and a discharging table arranged on the base.

Description

Technical Field

[0001] This invention relates to the field of powder forming equipment technology, specifically to a fully automatic powder pressing device and a powder pressing method, which is applicable to the automatic pressing and forming of various powder materials such as mineral powder, metal, ceramics, and cement. Background Technology

[0002] In the fields of industrial testing and materials analysis, many powdered samples need to be pressurized before being sent to analytical instruments for testing. Currently available powder pressing equipment often suffers from the following drawbacks: First, traditional pressure testing machines mostly use the principle of manual hydraulic jacks, which require experimenters to manually operate to pressurize, resulting in extremely high labor intensity for scenarios with high testing frequency. Secondly, manual operation makes it difficult to maintain the pressure at a constant value for the set time, resulting in poor tablet quality stability and affecting the accuracy of subsequent test results. Third, existing automatic tablet presses often suffer from problems such as low powder feeding accuracy, limited pressing parameters, and lack of intelligent monitoring and feedback mechanisms. They are difficult to adapt to the pressing requirements of various powder materials, and the molding efficiency and product yield need to be improved.

[0003] Furthermore, with the widespread application of nanoscale powder materials, higher requirements are placed on the pressing precision of sample presses. Existing equipment lacks the ability to collect, analyze, and optimize parameters throughout the pressing process, thus failing to meet the needs of high-end manufacturing and precision testing fields.

[0004] Therefore, developing a powder pressing machine that combines fully automated operation with high-precision control is of great practical significance. Summary of the Invention

[0005] To address the aforementioned technical problems of existing powder pressing machines, such as laborious operation, unstable pressure control, low powder feeding accuracy, limited parameters, and insufficient intelligence, making them unsuitable for high-precision, multi-category powder pressing requirements, this invention provides a fully automatic powder pressing device and method. This invention achieves fully automated operation from automatic powder collection, precise weighing, pressing and molding to finished product output, improving the stability of pressing quality and production efficiency, reducing labor intensity, and featuring adjustable multiple parameters and intelligent detection functions to adapt to the pressing requirements of different types of powder materials.

[0006] The technical means employed in this invention are as follows: A fully automatic powder pressing device includes a base; a powder storage bin and a powder metering dish mounted on the base; a first robotic arm for gripping and transferring the powder metering dish; a pressure table mounted on the base for placing a powder forming mold; a second robotic arm for placing the powder forming mold on the pressure table; a pressure rod with a pressure head located below its front end and directly above the pressure table; a drive mechanism for driving the pressure rod to move up and down, the drive mechanism including a servo motor, a multi-stage reduction mechanism connected to the output end of the servo motor, and a lead screw driven by the multi-stage reduction mechanism, the pressure rod being linked to the lead screw; a touch screen and an intelligent control system, the intelligent control system being electrically connected to the touch screen, the first robotic arm, the second robotic arm, the servo motor of the drive mechanism, and the pressure sensor; and a discharge platform mounted on the base.

[0007] Furthermore, a pressure sensor for collecting pressure during the pressing process is also provided above the pressure rod, as well as a cleaning nozzle provided on the base. The cleaning nozzle is connected to the intelligent control system and is used to spray high-pressure gas in 360° to clean each powder contact device.

[0008] Furthermore, the intelligent control system receives parameters input through the touch screen and sequentially controls the second robotic arm to place the powder forming mold, controls the first robotic arm to take powder from the powder storage bin to the powder metering dish for weighing and then pour it into the powder forming mold, controls the servo motor to drive the pressure rod down through the lead screw, controls pressure holding and pressure release based on feedback from the pressure sensor, controls the second robotic arm to transfer the formed tablet to the discharge table, and controls the cleaning nozzle to perform 360° cleaning.

[0009] Furthermore, it also includes an automatic PVC ring ejection chamber, which is disposed on the base for storing PVC rings, and the second robotic arm is used to grab PVC rings from the automatic PVC ring ejection chamber as the powder molding mold; The PVC ring automatic ejection chamber is equipped with a spring device for ejecting the PVC rings one by one.

[0010] Furthermore, the drive mechanism also includes a transmission column, the lead screw and the multi-stage reduction mechanism are disposed inside the transmission column, and the servo motor is disposed inside the base of the base. Furthermore, it also includes a 360° monitoring camera and an emergency stop button, which are mounted on the base. The 360° monitoring camera is connected to the intelligent control system.

[0011] The present invention also provides a method for powder tableting using a fully automatic powder pressing device, comprising the following steps: Step 1: Input the powder quantity, pressing pressure, and holding time parameters to the intelligent control system via the touch screen; Step 2: The intelligent control system controls the second robotic arm to grab the powder forming mold and place it in a fixed position on the pressure table; The intelligent control system controls the first robotic arm to take powder from the powder storage bin to the powder metering dish for weighing, and then transfers the weighed powder and pours it into the mold located on the pressure table. Step 3: The intelligent control system controls the servo motor to rotate forward, drives the lead screw through a multi-stage reduction mechanism, and then drives the pressure rod and pressure head to descend to pressurize the powder in the mold. At the same time, the pressure sensor monitors the pressure in real time. Step 4: When the pressure reaches the preset value, the intelligent control system controls the servo motor to stop to maintain the pressure. After the preset pressure holding time is reached, the servo motor is controlled to reverse, driving the pressure rod and pressure head to rise and reset. Step 5: The intelligent control system controls the second robotic arm to transfer the formed tablet from the pressure table to the discharge table.

[0012] Furthermore, in step two, the powder forming mold is a PVC ring, and the second robotic arm automatically picks up the PVC ring from the ejector box. Furthermore, the method also includes step six: the intelligent control system controls the cleaning nozzle to perform 360° cleaning of the powder metering dish, pressure table and pressure head; After cleaning, the first robotic arm, the second robotic arm, and the pressure bar returned to their initial positions.

[0013] Furthermore, it also includes real-time monitoring of the device's operation via a 360° monitoring camera.

[0014] Compared with the prior art, the present invention has the following advantages: 1. This invention uses a robotic arm to grab and weigh powder, transfer it to a pressure table, and coordinate the pressing and shaping with the placement of the discharge platform to achieve fully automated operation from powder picking, weighing, pressing to discharge. No manual intervention is required, which greatly reduces the labor intensity of experimental personnel, improves production efficiency, and can meet the needs of high-frequency testing scenarios.

[0015] 2. The adoption of servo motor drive and multi-stage speed change mechanism and screw transmission structure solves the problem of unstable pressure caused by manual operation; at the same time, by collecting the pressing pressure value in real time, the intelligent control system accurately controls the pressure value and holding time to ensure uniform tablet density, high density, and an error of less than 1.5%, thereby improving the accuracy of subsequent test results.

[0016] 3. The touch screen allows for flexible setting of parameters such as powder weight, pressing pressure, and holding time, adapting to the pressing requirements of different types of materials such as mineral powder, metal, ceramics, cement, and nano-powders, thus expanding the applicability of the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the device of the present invention.

[0019] In the diagram: 1. Base; 2. Transmission column; 3. Pressure rod; 4. Pressure sensor; 5. First robotic arm; 6. Powder storage bin; 7. PVC ring; 8. Powder metering dish; 9. Automatic PVC ring ejection bin; 10. Pressure table; 11. Cleaning nozzle; 12. Discharge table; 13. Touch screen display; 14. Intelligent control system; 15. Emergency stop button; 16. 360° monitoring camera; 17. Second robotic arm. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0024] This invention provides a fully automatic powder pressing device, such as... Figure 1 As shown. This includes base 1, which provides fundamental support for other structures, ensuring the safe and stable operation of the equipment; A powder storage bin 6, mounted on base 1, stores the powder to be prepared and can hold several powder samples; a powder metering dish 8 recognizes the preset powder quantity command issued by the intelligent control system 14 and weighs the powder to be prepared; a first robotic arm 5 is used to grasp and transfer the powder metering dish 8; a pressure table 10, mounted on base 1, is used to place the powder forming mold; a second robotic arm 17 is used to place the powder forming mold on the pressure table 10; a pressure rod 3 has a pressure head located below its front part and directly above the pressure table 10; and a drive mechanism for driving the pressure rod 3 to move up and down, the drive mechanism including a servo motor and a multi-stage reduction mechanism connected to the output end of the servo motor. The device includes a lead screw driven by a multi-stage reduction mechanism, and a pressure rod 3 linked with the lead screw to achieve slow and smooth lifting and lowering of the pressure rod 3; a touch screen display 13 and an intelligent control system 14, the intelligent control system 14 being electrically connected to the touch screen display 13, the first robotic arm 5, the second robotic arm 17, the servo motor of the drive mechanism, and the pressure sensor 4 respectively; the touch screen display 13 is used for parameter setting and operation status display, and can preset parameters such as pressure value, holding time, and powder feeding amount; the intelligent control system 14 is the brain of the entire device, providing various instructions and receiving feedback for the entire workflow; the discharge platform 12 set on the base 1 holds the powder tablets placed by the second robotic arm 17.

[0025] Above the pressure rod 3 is a pressure sensor 4 for collecting pressure during the pressing process, which collects pressure data in real time and transmits it to the intelligent control system 14. There is also a cleaning nozzle 11 on the base 1, which is connected to the intelligent control system 14 and is used to spray high-pressure gas in 360° to clean each powder contact device.

[0026] The intelligent control system 14 receives parameters input through the touch screen 13 and sequentially controls the second robot 17 to place the powder forming mold, controls the first robot 5 to take powder from the powder storage bin 6 to the powder metering dish 8 for weighing and then pouring it into the powder forming mold, controls the servo motor to drive the pressure rod 3 to press down through the lead screw, controls the pressure holding and pressure release according to the feedback of the pressure sensor 4, controls the second robot 17 to transfer the formed tablet to the discharge table 12, and controls the cleaning nozzle 11 to perform 360° cleaning.

[0027] It also includes an automatic PVC ring ejection chamber 9, which is set on the base 1 and is used to store PVC rings 7. The second robot arm 17 is used to grab PVC rings 7 from the automatic PVC ring ejection chamber 9 as a powder molding mold. The automatic PVC ring ejection chamber 9 is equipped with a spring device to eject the PVC rings 7 one by one. The drive mechanism also includes a transmission column 2, a lead screw and a multi-stage reduction mechanism are installed inside the transmission column 2, and a servo motor is installed inside the base 1. It also includes a 360° monitoring camera 16 and an emergency stop button 15. The 360° monitoring camera 16 and the emergency stop button 15 are set on the base 1. The 360° monitoring camera 16 is connected to the intelligent control system 14. The emergency stop button 15 can immediately stop all operation of the equipment in an emergency, improve operational safety, monitor the status of each process during operation in real time, and issue an alarm prompt if there is any abnormality.

[0028] A method for pressing powder into tablets using a fully automated powder pressing device includes the following steps: Step 1: Input the parameters of pressed powder amount, pressing pressure and holding time to the intelligent control system 14 through the touch screen 13; Step 2: The intelligent control system 14 controls the second robotic arm 17 to grab the powder molding die and place it in a fixed position on the pressure table 10; The powder molding die is a PVC ring 7, and the second robotic arm 17 automatically pops out of the PVC ring chamber 9 to grab the PVC ring 7. The intelligent control system 14 controls the first robotic arm 5 to take powder from the powder storage bin 6 to the powder metering dish 8 for weighing, and then transfers the weighed powder and pours it into the mold located on the pressure table 10. Step 3: The intelligent control system 14 controls the servo motor to rotate forward, drives the lead screw through a multi-stage reduction mechanism, and then drives the pressure rod 3 and the pressure head to descend to pressurize the powder in the mold. At the same time, the pressure sensor 4 monitors the pressure in real time. Step 4: When the pressure reaches the preset value, the intelligent control system 14 controls the servo motor to stop to maintain the pressure. After the preset pressure holding time is reached, the servo motor is controlled to reverse, driving the pressure rod 3 and the pressure head to rise and reset. Step 5: The intelligent control system 14 controls the second robotic arm 17 to transfer the formed tablet from the pressure table 10 to the discharge table 12.

[0029] Step Six: The intelligent control system 14 controls the cleaning nozzle 11 to perform 360° cleaning on the powder metering dish 8, the pressure table 10, and the pressure head; After cleaning, the first robotic arm 5, the second robotic arm 17, and the pressure rod 3 returned to their initial positions.

[0030] It also includes real-time monitoring of the device's operation via 16 360° monitoring cameras throughout the entire process.

[0031] The specific workflow is as follows: Parameter settings: Preset parameters such as powder quantity, pressing pressure, and holding time via the touch screen 13, and transmit the parameter information to the intelligent control system 14; Preparation phase: Press the start button on the touch screen 13, the intelligent control system 14 issues a command, the second robotic arm 17 starts to start, grabs a PVC ring 7 located on the PVC ring automatic ejection chamber 9, places it in the fixed position on the pressure table 10, and then the second robotic arm 17 returns to the initial position, and the preparation work is completed.

[0032] Automatic powder weighing: The intelligent control system 14 issues a command, the first robotic arm 5 starts, and the powder to be tested in the powder storage chamber 6 is put into the quantitative dish 8. The first robotic arm 5 pours the powder to be tested into the PVC ring 7 located on the pressure table 10. After that, the first robotic arm 5 returns to the initial position, and the intelligent control system 14 issues a command to enter the pressure molding stage.

[0033] Pressure molding: The intelligent control system 14 controls the servo motor in the base 1 to rotate forward. After being reduced in speed by a multi-stage reduction mechanism, the servo motor drives the lead screw in the transmission column 2 to rotate. The transmission column 2 descends and when it touches the pressure plate to be pressed, the pressure sensor 4 feeds back to the control system 14. The intelligent control system 14 collects the voltage signal in real time and converts it into a pressure value. When the pressure reaches the preset value, the intelligent control system 14 controls the servo motor to stop and enters the pressure holding stage.

[0034] Pressure holding and pressure release: After the pressure holding time reaches the preset value, the intelligent control system 14 controls the servo motor to reverse, driving the lead screw to rotate in the opposite direction to the original preset position.

[0035] Automatic material discharge: The intelligent control system 14 controls the second robotic arm 17 to place the pressed powder block on the surface of the discharge table 12.

[0036] Cleaning the work surface: After the pressed powder block is removed, the intelligent control system 14 issues a command, the transmission column 2 descends to the preset position, the first robotic arm 5 sends the powder metering dish 8 to the preset position, and the intelligent control system 14 issues a cleaning command: the 360° cleaning nozzle 11 sprays high-pressure gas at all preset locations where there is residual powder, cleaning the residual powder on the powder metering dish 8, pressure table 10 and press head located on the first robotic arm 5. After cleaning of each location is completed, the 360° cleaning nozzle 11 sends feedback to the intelligent control system 14, and the intelligent control system 14 issues a command, and all modules return to their original positions, and one tableting operation is completed.

[0037] Cyclic work: After completing the entire process, the next work cycle begins.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fully automatic powder pressing device, characterized in that, Includes a base; a powder storage bin and a powder metering dish mounted on the base; a first robotic arm for gripping and transferring the powder metering dish; a pressure table mounted on the base for placing a powder forming mold; a second robotic arm for placing the powder forming mold on the pressure table; and a pressure rod with a pressure head located below the front part of the pressure rod, and the pressure head being directly above the pressure table. A drive mechanism for driving the pressure rod to move up and down includes a servo motor, a multi-stage reduction mechanism connected to the output end of the servo motor, and a lead screw driven by the multi-stage reduction mechanism, wherein the pressure rod is linked to the lead screw; a touch screen and an intelligent control system, wherein the intelligent control system is electrically connected to the touch screen, the first robotic arm, the second robotic arm, the servo motor of the drive mechanism, and the pressure sensor; and a discharge platform disposed on the base.

2. The fully automatic powder pressing device according to claim 1, characterized in that, A pressure sensor for collecting pressure during the pressing process is installed above the pressure rod, and a cleaning nozzle is installed on the base. The cleaning nozzle is connected to the intelligent control system and is used to spray high-pressure gas in 360° to clean each powder contact device.

3. The fully automatic powder pressing device according to claim 1, characterized in that, The intelligent control system receives parameters input through the touch screen and sequentially controls the second robotic arm to place the powder forming mold, controls the first robotic arm to take powder from the powder storage bin to the powder metering dish for weighing and then pour it into the powder forming mold, controls the servo motor to drive the pressure rod down through the lead screw, controls pressure holding and pressure release based on feedback from the pressure sensor, controls the second robotic arm to transfer the formed sheet to the discharge table, and controls the cleaning nozzle to perform 360° cleaning.

4. The fully automatic powder pressing device according to claim 1, characterized in that, It also includes an automatic PVC ring ejection chamber, which is set on the base and used to store PVC rings. The second robotic arm is used to grab PVC rings from the automatic PVC ring ejection chamber as the powder molding mold. The PVC ring automatic ejection chamber is equipped with a spring device for ejecting the PVC rings one by one.

5. The fully automatic powder pressing device according to claim 1, characterized in that, The drive mechanism also includes a transmission column, the lead screw and the multi-stage reduction mechanism are disposed inside the transmission column, and the servo motor is disposed inside the base of the base.

6. The fully automatic powder pressing device according to claim 1, characterized in that, It also includes a 360° monitoring camera and an emergency stop button, which are mounted on the base. The 360° monitoring camera is connected to the intelligent control system.

7. A method for pressing powder into tablets using a fully automatic powder pressing device, implemented based on the fully automatic powder pressing device described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Input the powder quantity, pressing pressure, and holding time parameters to the intelligent control system via the touch screen; Step 2: The intelligent control system controls the second robotic arm to grab the powder forming mold and place it in a fixed position on the pressure table; The intelligent control system controls the first robotic arm to take powder from the powder storage bin to the powder metering dish for weighing, and then transfers the weighed powder and pours it into the mold located on the pressure table. Step 3: The intelligent control system controls the servo motor to rotate forward, drives the lead screw through a multi-stage reduction mechanism, and then drives the pressure rod and pressure head to descend to pressurize the powder in the mold. At the same time, the pressure sensor monitors the pressure in real time. Step 4: When the pressure reaches the preset value, the intelligent control system controls the servo motor to stop to maintain the pressure. After the preset pressure holding time is reached, the servo motor is controlled to reverse, driving the pressure rod and pressure head to rise and reset. Step 5: The intelligent control system controls the second robotic arm to transfer the formed tablet from the pressure table to the discharge table.

8. The method for pressing powder into tablets using a fully automatic powder pressing device according to claim 7, characterized in that, In step two, the powder forming mold is a PVC ring, and the second robotic arm automatically picks up the PVC ring from the ejector box.

9. A method for pressing powder into tablets using a fully automatic powder pressing device according to claim 7, characterized in that, The method also includes step six: the intelligent control system controls the cleaning nozzle to perform 360° cleaning of the powder metering dish, pressure table and pressure head; After cleaning, the first robotic arm, the second robotic arm, and the pressure bar returned to their initial positions.

10. A method for pressing powder into tablets using a fully automatic powder pressing device according to claim 7, characterized in that, It also includes real-time monitoring of the device's operation via 360° monitoring cameras.

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